详解python自定义模块

echo 'export PYTHONPATH='/root/pythondiy/' >> /root/.bashrc # 此目录为你模块的路径# 然后使用sys模块查看环境变量import syssys.path          # 返回一个列表['', '/usr/local/bin', /root/pythondiy', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-linux2', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages', '/usr/local/lib/python2.7/site-packages/setuptools-28.8.0-py2.7.egg', '/usr/local/lib/python2.7/site-packages/pip-9.0.1-py2.7.egg', '/usr/local/lib/python2.7/site-packages/IPython/extensions', '/root/.ipython']

open('/etc/passwd').read()                        # 返回全文的是stropen('/etc/passwd').readlines()                   # 返回全文的是一个listopen('/etc/passwd').readline()                    # 每一次读取一行，返回str

vim wc.py#!/usr/bin/python from sys import argv def wc(s):    chars = len(s)    words = len(s.split())    lines = s.count('')    return  lines,words,chars if __name__== '__main__':                      # 只有在执行此脚本时才调用函数。    with open(argv[1]) as file1:        print wc(file1.read())         vim copy_wc.pyimport

[root@peng pyth]# python wc.py  /etc/passwd    # 返回的是passwd文件统计(23, 31, 1066)[root@peng pyth]# python copy_wc.py            # 返回的是hosts文件统计(2, 10, 158)

# 需要在包里创建一个__init__.py空文件，也可以是包的描述touch __init__.pyipythonfrom pyth import wc                            # 这样就导入一个模块包